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                            <div style="color:gray; word-break: break-all; font-size:12px;">原英文版地址: <a href="https://www.elastic.co/guide/en/elasticsearch/reference/7.7/index-options.html" rel="nofollow" target="_blank">https://www.elastic.co/guide/en/elasticsearch/reference/7.7/index-options.html</a>, 原文档版权归 www.elastic.co 所有<br/>本地英文版地址: <a href="../en/index-options.html" rel="nofollow" target="_blank">../en/index-options.html</a></div>
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<strong>重要</strong>: 此版本不会发布额外的bug修复或文档更新。最新信息请参考 <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html" rel="nofollow">当前版本文档</a>。
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<span class="breadcrumb-link"><a href="index.html">Elasticsearch Guide [7.7]</a></span>
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<span class="breadcrumb-link"><a href="mapping-params.html">Mapping parameters</a></span>
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<span class="breadcrumb-node"><code class="literal">index_options</code></span>
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<h2 class="title">
<a id="index-options"></a><code class="literal">index_options</code><a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/mapping/params/index-options.asciidoc">edit</a>
</h2>
</div></div></div>
<p>The <code class="literal">index_options</code> parameter controls what information is added to the
inverted index for search and highlighting purposes.</p>
<div class="warning admon">
<div class="icon"></div>
<div class="admon_content">
<p>The <code class="literal">index_options</code> parameter is intended for use with <a class="xref" href="text.html" title="Text datatype"><code class="literal">text</code></a> fields
only. Avoid using <code class="literal">index_options</code> with other field datatypes.</p>
</div>
</div>
<p>It accepts the following values:</p>
<div class="variablelist">
<dl class="variablelist">
<dt>
<span class="term">
<code class="literal">docs</code>
</span>
</dt>
<dd>
Only the doc number is indexed.  Can answer the question <em>Does this term
exist in this field?</em>
</dd>
<dt>
<span class="term">
<code class="literal">freqs</code>
</span>
</dt>
<dd>
Doc number and term frequencies are indexed.  Term frequencies are used to
score repeated terms higher than single terms.
</dd>
<dt>
<span class="term">
<code class="literal">positions</code> (default)
</span>
</dt>
<dd>
Doc number, term frequencies, and term positions (or order) are indexed.
Positions can be used for
<a class="xref" href="query-dsl-match-query-phrase.html" title="Match phrase query">proximity or phrase queries</a>.
</dd>
<dt>
<span class="term">
<code class="literal">offsets</code>
</span>
</dt>
<dd>
Doc number, term frequencies, positions, and start and end character
offsets (which map the term back to the original string) are indexed.
Offsets are used by the <a class="xref" href="search-request-body.html#unified-highlighter" title="Unified highlighter">unified highlighter</a> to speed up highlighting.
</dd>
</dl>
</div>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">PUT my_index
{
  "mappings": {
    "properties": {
      "text": {
        "type": "text",
        "index_options": "offsets"
      }
    }
  }
}

PUT my_index/_doc/1
{
  "text": "Quick brown fox"
}

GET my_index/_search
{
  "query": {
    "match": {
      "text": "brown fox"
    }
  },
  "highlight": {
    "fields": {
      "text": {} <a id="CO348-1"></a><i class="conum" data-value="1"></i>
    }
  }
}</pre>
</div>
<div class="console_widget" data-snippet="snippets/764.console"></div>
<div class="calloutlist">
<table border="0" summary="Callout list">
<tr>
<td align="left" valign="top" width="5%">
<p><a href="#CO348-1"><i class="conum" data-value="1"></i></a></p>
</td>
<td align="left" valign="top">
<p>The <code class="literal">text</code> field will use the postings for the highlighting by default because <code class="literal">offsets</code> are indexed.</p>
</td>
</tr>
</table>
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